Semester Exam Review- Chem

What are the coefficients when this chemical equation is balanced?

_CaCO3 + _H3PO4 --> _Ca3(PO4)2 + _H2CO3

Which group on the periodic table are common oxidizing agents?

What is occurring at the cathode of the electrochemical cell containing the reaction represented by the following equation?

Zn + Cu²⁺ → Cu + Zn²⁺

How many atoms are in 9.35 moles of lithium?

What is the percent composition of caffeine?

C₈H₁₀N₄O₂

How many moles of iron (III) hydroxide are produced when 5.0 moles of sodium hydroxide react with excess iron (III) chloride according to this balanced chemical equation?

FeCl3 + 3NaOH → Fe(OH)3 + 3NaCl

What is the mass of sodium chloride produced when 8.3 g of sodium is reacted with 4.5 g of chlorine?

2Na(_s) + Cl2(g) → 2NaCl

A 1.0 L container is filled with gas at 2.5 atm. Later the gas is transferred into a larger 3.0 L container. Determine the pressure of the gas in the larger container if the temperature of the gas also changed from 350 K to 298 K.

What is the volume of 0.789 moles of gas that exerts 1.15 atm of pressure at 376 K?

R = .08206 L*atm/mol*K

What is the pH of a solution that contains [H3O+] = 1×10^-8 M

What two pieces of equipment are used for a titration experiment?

Which of these parts of an organic compound is an atom or group of atoms that always reacts a certain way?

What is the prefix for a 7 carbon chain?